National Dental Examining Board of Canada (NDEB) Practice Exam 2025 - Free NDEB Practice Questions and Study Guide

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In trimming stainless steel crowns, special attention must be paid to the greater length necessary in the region of the MB bulge in the primary which tooth?

Mandibular First Molar

When trimming stainless steel crowns, the dentist must be aware that the MB bulge on primary mandibular first molars often requires longer crowns, making option A the correct answer.

Option B, maxillary first molars, typically do not have a significant MB bulge that would require extra length in the crown.

Option C, mandibular second molars, may have a slight bulge, but not to the same extent as the first molars.

Option D, maxillary second molars, do not have a MB bulge and therefore would not require additional length in the crown. Overall, option A is the most correct answer because of the specific mention of the primary mandibular first molar in the question.

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Maxillary First Molar

Mandibular Second Molar

Maxillary Second Molar

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